Lock with bolt operating mechanism remaining permanently in the case



June 16, 1936. H, DENULL i 2,044,381

LOCK WITH BOLT OEBRATING MECHANISM REMAINING PERMANEN'E'LY IN THE CASEFiled Feb. 3, 1935 FIG. 7.

mummy HH muumm ?atented June 16, 1936 LOCK WITH BOLT OPERATWG MECHANISMREMAINING PERMANEN-TLY IN THE CASE Hans Denull, Berlin-Gharlottenburg,Germany,

designer to Heinrich Goldbeck, Berlin, Germany Application February 3,1933, serial No. 655,099 In Germany February 6, 1932 3 Claims.

This invention relates to a lock with a bolt operating mechanismremaining permanently in the case and characterized chiefly by the factthat the fulcrum of the bolt operating mechanism lies parallel orsubstantially parallel to the door plane.

The key hole on one side of the door is preferably perpendicular and onthe other side parallel or approximately parallel to the door plane.Both key holes unite anterior to the bolt operating mechanism to form a.single key hole and at the point oi junction a guide flap is providedwhich can be alternately turned towards the one or the other side by thekey.

The key guide, particularly that which is perpendicular to the doorplane, may also be divided in that one portion is accommodated withinthe lock case and the other in a separate sleeve inserted in the door.

Further features of the invention are hereinafter set forth.

Several embodiments of the invention are illustrated by way of examplein the accompanying drawing in which:---

Fig. 1 shows in elevation the inner side of part of an automatic machinedoor with lock, comprising a bolt actuating mechanism with a horizontalfulcrum, and in operative position.

Fig. 2 is an end view of Fig. 1.

Fig. 3 is an end view of Fig. 1, the bolt actuating mechanism being ininoperative position.

Fig. 4 shows in end view a lock with bolt actuating mechanism withvertical fulcrum fitted on the inner side of a door. 4

Fig. 5 shows in rear elevation the lock case of the constructionillustrated in Fig. 4 with the cover plate removed, the lock bolt beingin inoperative position.

Fig. 6 is a similar view to Fig. 5, the cover plate 40 being, however,only partly broken away and the lock bolt being in operative position.

Fig. 7 shows in end view a mortise lock in a door with separatelyremovable key guide sleeves on both sides, the fulcrum of the boltactuating mechanism extending perpendicularly to the door plane.

Fig. 8 is a perspective view showing a guide sleeve with exchangeableguide ring.

Fig. 9 shows the key in elevation with its shank 50 in straight positionand covered by a shank protecting sleeve shown in longitudinal section.

Fig. 10 shows in elevation the key in bent position. Fig. 11 is asimilar view to Fig. 9, the key being turned through 90.

Fig. 12 shows in elevation a key shank element with central bore throughwhich the connecting wire is threaded.

Fig. 13 is a similar view to Fig. 12 showing the element being turnedabout its axis through an 5 angle of 90. 7

According to Fig. 1 a key guide or channel 2 is provided on the door Iof the automatic machine and closed at one end by a lock casing 3 of anysuitable construction by means of a rotatable connecting disc 5 havingprojections or pins 5 and M for the bolts 6. An aperture 1 is providedin the other end of the key guide 2 for insertion of a key with flexibleshank d. To enable the key to be inserted in the proper manner it has onits handle portion 9 feeler knobs i0 which must be always upwardlydirected in order to allow an easy and perfect entrance of the key bitii into the cylindrical lock illustrated in the drawin and an abutmentof the bit ii against the rotary disc 5.

The rotary disc 5 with the connecting pins 3 and 5a for operating thebolts 6 is preferably separately mounted for example as shown in Fig. iin cheek bearings or according to Fig. 5 in a bridge 8' which in theform shown in Fig. 5 divides the case of the look into a key guidingcompart ment and a bolt compartment and also supports the lock casing 3and the key guide 2. If the bolts 6 are in locking position according toFig. 1, they cannot be'unintentionally shifted back even when employingforce because they are opposed by the two connecting pins t and to ofthe rotary disc 5. The bit it of the key penetrates into a central borein the connecting disc 5 and on being turned rotates the latter andshifts the bolts 6. V

As shown in Fig. 3 the ends of the bolts overlap when in inoperativeposition, one pin of the rotary disc being longer than the other andpreferably diametrically oppositely situated to enable both bolts to bemoved simultaneously. One bolt engages by means of a fork i2 one of thepins of the rotary disc and the other bolt engages by means of anelongated aperture in an arm it the second and longer connecting pin toof the rotary disc 5. The ends of the bolts-t are in this manner guidedone past the other entirely free from friction, the ends of theelongated hole of the arm l3 forming an abutment for pin 6a and limitingthe rotary movement of the rotary disc 5.

In the second form of construction shown in Figs. 4 to 6 the connectingpins 4 and 4a of the. rotary disc ti engage successively in teethprovided in the bolt 6 in such a manner that the movement of' the rotarydisc effects a continual movement of the bolt. The stroke of the boltduring the locking and unlocking movement is limited by abutments H ofany suitable construction, against which 'abutments the one or the otherpin 4 and 4a of the rotary disc 5 abuts so that the movement of therotary disc 5 and of the bolt 6 is arrested. During the shifting of thebolt, that is during the turning of the key,

the rotary disc 5, as above mentioned, is rotated by the key bit Iaround its axis or the axis of the key guide so that one of itsprojections or pins always passes out of a tooth of the slide bolt 6 inorder to continue the movement of the bolt with the opposite orfollowing projection or pin until the movement is checked by one of theabutments l4 preferably arranged in the last tooth.

The bolt illustrated in Figs. 4 to 6 can'in this manner act towardseither side, that is can be employed as looking towards the right or theleft.

Fig. 4 also shows that key guides 2 are provided both on the outer andinner sides of the door, which guides unite to form a single guideleading to the lock 3 as can be seen from Figs. 1, 4 and 5. At the pointof junction of these two guides a guide flap 24 (Fig. 4) may be providedwhich can be swung over to one side or the other by the key.

As shown in Fig. 4, the lock case 28 is closed on the side of the doorby a cover plate 28 which prevents boring into the case. ,This coverplate 29 is bent to form flanges 30, 3| at each end. These flanges 30,3| are resiliently held in the casing 28 and slightly longer than thedepth of the case so that the cover plate 29 does not bear against theinner side of the lock proper or against the inner parts of the case andcan not therefore impede the function of these parts.

The cover plate has an aperture 32 for the outwardly extending guidechannel 2. Such a cover plate requires no additional means for flxing,but its resilient flanges 30, 3| hold it reliably in a certain positionon the lock case. The screw connections hitherto necessary are thereforeentirely omitted. The cover plate can be removed merely by inserting atool, such as a screw driver in recesses provided for this purpose andprising it out of the case owing to the cover plate 28 being held in thecase merely by the friction of the flanges 30, 3|.

It is further pointed out that, when the key is removed, the'rotary disc5 is connected to the lock in such a. manner that neither the disc northe lock can move. It is evident that the rotary disc 5 can be providedwith more than two connecting pins .4 and 4a.

Figs. 7 and 8 show adihird form of construction wherein the lock isconstructed as a mortise lock. The key guide is interrupted on each sideof the door in order to enable the lock to be inserted in the woodlining without 'in any way superficially damaging the door frame. It isonly necessary to mortise the frame at the point where the lock is to beinserted and the apertures provided in the door for accommodating thecover sleeves l5 are covered by guide rings IS without screws. Theseguide rings l6 are anchored in the manner hereinafter described when thesleeves l5 provided with the continued key guide 2 are pressed into theguide rings in the corresponding door apertures. According to thethickness and strength of the door the cover sleeve i5 projects more orless from the guide rings IS. The two opposite sleeves I! areinterconnected and held together by means of long bolts extendingthrough the mortise lock.

The guide rings l6 are first inserted in the door openings, whereuponthe sleeves l5 are slipped into the rings. These rings i6 have resilientclamps 8 which are pressed outwards into the wood of the door frame whenthe sleeve is forced therein so that the rings i6 and sleeves l5 areautomatically anchored in the door frame as the clamp l8 not only gripsinto the wood but also exerts considerable frictional resistance on theperiphery of the sleeves IS.

A key for operating the lock according to the invention is illustratedin Figs. 9 to 13 of the accompanying drawing. This key consists of ashank portion composed of individual elements connected by cardanjoints, which elements are reinforced to form a complete unit byresilient means, such as wires 2| extending through central bores IS inthe individual elements and connecting the key bit, which is preferablyof crossshaped cross section, with the key handle.

The interengagement of the individual elements 20 is clearly shown onthe drawing and Figs. 9 to 13 show that it is possible to turn the keyshank 8 in all directions. Such a key can withstandmtrong bendingandtorsional stresses without any danger of breaking.

I claim:-

1. A look, comprising in combination a case, a rotatable bolt operatingmechanism perma-e nently in said case, said mechanism having its fulcrumsubstantially parallel to the door plane, key guides one on each side ofthe door leading to said bolt operating mechanism, the guide on one sideof the door being perpendicular to the door plane and that on the otherside of the door being substantially parallel to the door plane.

2. A look as specified in claim 1, comprising in combination with thecase, a key guide leading to said case and extending on one side of thedoor perpendicularly and on the other side parallel to the plane of thedoor, said guide being divided into two parts, one part located in saidcase, and a sleeve inserted in the door carrying the other guide part.

3. A look as specified in claim 1, comprising in combination with thecase and the rotatable bolt actuating mechanism, two key guides leadingto said case uniting to form a single guide anterior to said bolt"actuating mechanism, so that the key always enters the bolt actuatingmechanism from the same point.

HANS DENULL.

